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add cmd line opt to disable frame index reuse for ARM and T2. debug aid.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84664 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2009-10-20 20:19:50 +00:00
parent cd53f64367
commit 18ed9c9a2b
1 changed files with 7 additions and 0 deletions
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7
lib/Target/ARM/ARMBaseRegisterInfo.cpp
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@ -36,8 +36,13 @@
#include "llvm/Target/TargetOptions.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/CommandLine.h"
using namespace llvm;
static cl::opt<bool>
ReuseFrameIndexVals("arm-reuse-frame-index-vals", cl::Hidden, cl::init(true),
cl::desc("Reuse repeated frame index values"));
unsigned ARMBaseRegisterInfo::getRegisterNumbering(unsigned RegEnum,
bool *isSPVFP) {
if (isSPVFP)
@ -1088,6 +1093,8 @@ ARMBaseRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
Offset, Pred, PredReg, TII);
}
MI.getOperand(i).ChangeToRegister(ScratchReg, false, false, true);
if (!ReuseFrameIndexVals)
ScratchReg = 0;
}
return ScratchReg;
}